Patent GB-243833-A (GB)
Title: Improvements in wiping mechanism for copperplate-printing presses
IPC: B41F9/14
Filed: 1924-09-13
Abstract: 243,833. Heinrich, F. Sept. 13, 1924. Inking-apparatus.-Relates to plate-printing machines having wiping-mechanism carried by two vertical pillars 6b, Fig. 1, mounted eccentrically on two vertical shafts 6<a>, and consists in securing the wiping-mechanism in position by a locking- member 41 on each pillar 6b, which member can be readily disengaged by a single manipulation so that the wiping-mechanism can be lifted out for inserting a fresh roll of wiping- material. The shafts 6<a> are driven from a shaft 9 through gears 7, 8, and are rotatably mounted at their lower ends in bearings 21 screw-threaded to engage with nuts 22 fixed to the framing. A lever 26 is actuated by adjustable cams 30<a>, 30<b> on a shaft 28 to move a link 24 serving to rotate the bearings 21 and thus raise and lower the shafts 6<a>, thus reciprocating the wiping- mechanism to and from the bed 1 of the press. The rollers carrying the wiping-material are mounted in side standards A each having two brackets 15, 39. The brackets 15 are attached by pins 14 to members 13 slidable on the pillars 6<b> and suppored by springs 32 and a suitable. number of washers 33, 34. Springs 36 press on the upper sides of the members 13, the pressure being adjusted by means of nuts 37 on screwed sleeves 35, the thrust on which is taken by the locking-members 41. The members 41 have screws 41<a> adapted to engage bayonet slots 200 in the pillars 6<b> so that they can be easily removed to allow of the removal of the standards A and wiping-mechanism carried thereby. A sleeve 42 is provided to prevent disengagement of the parts 41, 35. Bearing-surfaces 38 on the sleeves 35 are guided in grooves in the brackets 39 to allow of vertical movement of the standards A with respect to the pillars 6<b>. The wiping-material passes from a roll 48, over an elastic pad 19 in a channel beam 18, back around the roll 48, again over the pad 19, and thence to a, winding-roll 49, and is fed by means of a continuous band 45, Fig. 2, engaging teeth on an intermittently-actuated roller 44 and passing over guide-rollers 46, 47. The material on the roller 49 bears on a roller 51 geared to a roller 50 bearing on the roll 48, the gearing between the rollers 50, 51 being arranged so as to rotate the roll 49 faster than the roll 48. The ends of the rollers 48 - - 51 are guided in side slots in the standards A and secured by spring-pressed members 52. The roller 44 is rotated by a gear-wheel 53 engaging a worm 54 journaled in the bracket 15 and carrying a ratchet wheel 55, Fig. 3, adapted to be engaged by a pivoted spring-controlled rack 57 when the wiping-mechanism is raised from the bed 1. An adjustable stop 62 on the machine, bed engages an extension 53 on the rack 57 as the pillars 6<b> are lowered, and tilts the rack out of engagement with the ratchet wheel 55, while the engagement of the stop with a roller 59 on the rack as the standards are moving transversely in their raised positions serves to rotate the ratchet wheel 55 and thus feed the wiping-material. When it is desired to replace the wiping-material, the members 41 are detached from the pillars 6b so that the standards and wiping-mechanism can be lifted out of the machine, and the members 52 are removed so as to allow of the removal of the rolls from the standards. Where a number of similar wiping-mechanisms are employed, the shafts 9 are geared together, and the cams 30<a>, 30<b> of each mechanism are so adjusted that each wiping- mechanism is lowered on the printing-plate 3 only when the forward end of the plate has moved beneath it and raised before the rear end has left it.